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JR36 sealed electromagnetic thermal overload relay, a high-power miniature pin type AC accessory for long distance motor control. Features 9A-95A wide current, 3-phase stability, flexible mounting and heavy-duty durable build.
JR36 sealed electromagnetic thermal overload relay, a high-power miniature pin type AC accessory for long distance motor control. Features 9A-95A wide current, 3-phase stability, flexible mounting and heavy-duty durable build.
JR36 sealed electromagnetic thermal overload relay is a professional protective accessory designed for high-power AC motor systems and long-distance industrial control scenarios. It is the core component that prevents motor damage due to thermal overload, current imbalance, and phase loss. This relay adopts a fully sealed electromagnetic structure, which can block dust, moisture, and external electrical interference.
Key Features：
Robust Sealed Design: Heavy-duty sealed electromagnetic structure enhances overall durability, enabling reliable long-distance switching and signal transmission, with strong resistance to external interference and harsh working conditions.
Broad Amperage Coverage: Easily adjustable from 9A to 95A, covering a wide spectrum of motor protection needs with a single model.
Heavy-Duty Cycle Rating: Constructed with high-quality contacts and thermal elements to withstand frequent start-stop operations and extended service life.
Stable 3-Phase Design: Standard 3-phase structural configuration ensures even and stable power distribution, effectively protecting motors from phase loss.
Applications:
HVAC Systems
Agricultural Equipment
Power Distribution Panels
| Model | Current Adjus- tment Range |
Control Power(kW) | Pluggable Contactor | Short Circuit Protection Fusegreed Heating Current |
|||||
| 220V | 380V | 415V | 440V | 660V | aM | gG | |||
| JR28-09301d | 0.1~0.16 | CJX2-09~25 | 0.25 | 2 | |||||
| JR28-09302d | 0.16~0.25 | CJX2-09~25 | 0.5 | 2 | |||||
| JR28-09303d | 0.25~0.40 | CJX2-09~25 | 1 | 2 | |||||
| JR28-09304d | 0.40~0.63 | 0.37 | CJX2-09~25 | 1 | 2 | ||||
| JR28-09305d | 0.63~1 | 0.55 | CJX2-09~25 | 2 | 4 | ||||
| JR28-09306d | 1~1.6 | 0.37 | 0.55 | 0.75 | CJX2-09~25 | 2 | 4 | ||
| JR28-09307d | 1.6~2.5 | 0.37 | 0.55 | 0.75 | 1.1 | 1.5 | CJX2-09~25 | 4 | 6 |
| JR28-09308d | 2.5~4 | 0.75 | 1.1 | 1.5 | 2.2 | 3 | CJX2-09~25 | 6 | 10 |
| JR28-09310d | 4~6 | 1.1 | 2.2 | 2.2 | 2.2 | 4 | CJX2-09~25 | 8 | 16 |
| JR28-09312d | 5.5~8 | 1.5 | 3 | 3.7 | 3.7 | 5.5 | CJX2-09~25 | 12 | 20 |
| JR28-09314d | 7~10 | 2.2 | 4 | 4 | 4 | 7.5 | CJX2-09~25 | 12 | 20 |
| JR28-12316d | 9~13 | 3 | 5.5 | 5.5 | 5.5 | 10 | CJX2-09~25 | 16 | 25 |
| JR28-18321d | 12~18 | 4 | 7.5 | 9 | 9 | 15 | CJX2-09~25 | 20 | 35 |
| JR28-25322d | 17~25 | 5.5 | 11 | 11 | 11 | 18.5 | CJX2-09~25 | 25 | 50 |
| JR28-32353d | 23~32 | 7.5 | 15 | 15 | 15 | 22 | CJX2-32 | 40 | 63 |
| JR28-32355d | 28~36 | 10 | 18.5 | 22 | 22 | 30 | CJX2-32 | 40 | 80 |
| JR28-40353d | 23~32 | 7.5 | 15 | 15 | 15 | 22 | CJX2-40~80 | 40 | 63 |
| JR28-40355d | 30~40 | 10 | 18.5 | 22 | 22 | 30 | CJX2-40~80 | 40 | 80 |
| JR28-50357d | 37~50 | 11 | 22 | 25 | 25 | 37 | CJX2-40~80 | 63 | 100 |
| JR28-65359d | 48~65 | 15 | 25 | 30 | 30 | 45 | CJX2-40~80 | 63 | 100 |
| JR28-65361d | 55~70 | 18.5 | 30 | 37 | 37 | 55 | CJX2-40~80 | 80 | 125 |
| JR28-80363d | 63~80 | 22 | 37 | 45 | 45 | 75 | CJX2-40~80 | 80 | 125 |
| JR28-140365d | 80~104 | 30 | 45 | 55 | 55 | 75 | CJX2-115~170 | 125 | 200 |
| JR28-140367d | 95~120 | 30 | 55 | 75 | 75 | 90 | CJX2-115~170 | 125 | 224 |
| JR28-140369d | 110~140 | 37 | 63 | 75 | 75 | 110 | CJX2-115~170 | 160 | 250 |
| Selling Units | Single item |
| Quantity (pieces) | 1 – 100 | > 100 |
| Lead time (days) | 15 | To be negotiated |
| Theory | AC |
| Power Source | 50 Hz, 60 Hz |
| Terminal Shape | Screw or rail installation |
| Contact Material | CJX2 |
| Place of Origin | Zhejiang, China |
| Rated Current | 0.1-140A |
| Size | Miniature |
| Contact Load | Low Power |
| Model Number | JR28 |
| Brand Name | Westhomes |
The Westhomes JR36 Sealed Electromagnetic Thermal Overload Relay is a motor protection device designed to protect AC motors from overload, phase failure, and abnormal current conditions. It is commonly used with contactors to provide reliable overload protection in industrial motor control systems.
A thermal overload relay protects motors by detecting excessive current over a period of time. When a motor operates under overload conditions, the relay trips to disconnect the control circuit and help prevent overheating and damage.
Electromagnetic thermal overload protection combines thermal and electromagnetic detection methods. The thermal function responds to prolonged overcurrent conditions, while the electromagnetic function provides faster response to abnormal current changes, improving motor protection performance.
The JR36 is suitable for industrial motor control applications, including pumps, fans, compressors, conveyors, machine tools, and other motor-driven equipment. It is commonly installed in motor starters and electrical control panels.
A thermal overload relay mainly provides overload protection and is usually used together with a contactor for motor control. An MPCB combines overload protection, short-circuit protection, and manual switching functions in one device.
The JR36 monitors the motor current during operation. When the current exceeds the preset value for a certain period, the relay activates its trip mechanism, disconnecting the control circuit and preventing motor overheating.
No. A thermal overload relay is mainly designed for motor overload protection and phase failure protection. Additional short-circuit protection devices, such as fuses or circuit breakers, should be installed according to the system requirements.
Yes. The JR36 Thermal Overload Relay is designed to work together with AC contactors to create a complete motor starter solution. This combination provides motor switching control and overload protection.
The correct JR36 model should be selected according to the motor’s rated current, operating voltage, power rating, and application conditions. The overload setting should be adjusted close to the motor’s full-load current for effective protection.
The Westhomes JR36 provides reliable motor overload protection, stable performance, and a sealed design suitable for industrial environments. It is an effective solution for protecting motors, improving operational safety, and reducing equipment downtime.
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